Shuttle and filling carrier for looms



Aug. 21, 1934. I w. l. sTlMPsoN 1,971,282

SHUTTLE AND FILLING CARRIER FOR LOOMS Filed March 19, 1934 CLINTON S. Cosu /v.

ATTORNEY.

MLLACE j. JT/MPso/v.

Patented Aug. 21, 1934 1,971,282

UNITED STATES PATENT OFFICE SHUTTLE AND FILLING CARRIER FOR LOOMS Wallace I. Stimpson, Hopedale, Mass, assignor to Draper Corporation, Hopedale, Mass, a corporation of Maine Application March 19, 1934, Serial No. 716,247

4 Claims. ((11. 139-207) The present invention pertains to loom shut- Fig. 4 is a view of the spring jaws and filling tles, and has more particular reference to shutcarrier of Fig. 1, the spring jaws being shown in tles of the type adapted for use in automatic section. bobbin changing looms. Referring first to Figs. 1 and 4, the shuttle 1 is Shuttles of the type' mentioned are customarily provided with a cavity 2 within which is housed 60 provided with opposed spring jaws which are the filling carrier, as bobbin 3. The left hand end notched to receive rings mounted on the butt of of the shuttle is recessed to receive opposed spring a filling carrier, such as a bobbin or the like. jaws 4 and 5 which extend along the walls of the The filling carrier is automatically replaced by a cavity and which may have their shank portions new one by mechanism which drives the new integrally joined as shown. A spring cover 6, 65

filling carrier down into the shuttle from the top provided with an inclined bobbin guide '7 is firmthereof, the incoming filling carrier engaging the ly secured to the spring by means of a vertical old one and ejecting it out through the bottom of bolt or screw 8. The spring assembly is secured the shuttle. t will thus be seen that the rings in the shuttle body by meansof a horizontal bolt of the incoming filling carrier engage the rings 9. The shuttle and spring as thus far described 70 a of the filling carrier which is being ejected. are not of the present invention and it will be It has been found that in order to prevent muapparent that my invention is not limited to the tilation of the butts of the filling carriers during particular form of shuttle and spring assembly transfer, and in orderto insure effective placeshown.

ment of the filling carrier in the jaws of the The jaws 4 and 5 are each provided with par- 75 shuttle spring, the rings on the butt of the filling allel vertical notches or grooves 11, 11 which carrier should be positioned quite close together. notches are of uniform depth and are otherwise Two such rings, closely spaced, were found to not substantially identical. Only three such notches hold the filling carrier sufficiently rigid, and acin each jaw are required but it is preferred to cordingly the accepted practice has been to proprovide four, in order that the bobbin may still so vide three such rings. beproperly held if it is misplaced toward its tip Shuttles of the type mentioned, that is, shutduring the transferring operation. ties wherein the spring jaws have been provided In the embodiment under discussion the filling with three orlfour notches for receiving three carrier is modified to incorporate the features of 3c rings on a filling carrier, have been open to the my invention. To this end, the butt 12 of the objection that even the three rings and notches bobbin is provided with three parallel, circumferdo not hold the filling carrier as firmly as they ential rings 13, 14 and 15 which are spaced apart should due to unavoidable irregularities in both the same distance as the spacing of the notches the spring jaws and the filling carrier. The 11 in the spring jaws. It will be noted that the 35 failure to hold the filling carrier firmly contribrings are of the same thickness and the space utes materially to filling breakage and has thus between adjacent rings is substantially narrowbeen the cause of considerable wasted time and er than the thickness, or diameter, of the stock expense. of which the rings are formed. These rings are It is the principal object of my invention to made of spring steel stock, preferably of circular 40 provide, in an automatic loom shuttle of the type cross-section.

mentioned, means including opposed spring jaws The two outer rings, 13 and 15, are of subin the shuttle and three rings on the filling carstantially the same external diameter and enrier which are so constructed as to hold the fillgage in the'corresponding notches in the spring ing carrier with the desired firmness. jaws. The center ring 14 has a smaller external Further objects will become apparent as the diameter and consequently does not at any time description proceeds. engage in any of the notches. The smaller ex- Two embodiments of my invention are illusternal diameter of the center ring is preferably trated on the accompanying drawing. Referprovided by making the ring of the same diamering to said drawing: ter of stock as the outer rings but embedding it fig Fig. 1 is a plan view of the spring end of the in a deeper groove in the butt of the bobbin.

shuttle; It will be seen that the construction just de- Fig. 2 is a view similar to Fig. 1 but showing scribed is not subject to the above enumerated the second embodiment; disadvantages of the prior art. That is, the rings Fig. 3 is a detail, partly in section, of one of 13, 14 and 15 are so closely spaced that during 55 the spring jaws of Fig. 2; and transfer the rings on an incoming bobbin cannot 1m cause the bobbin to jump endwise, nor can they mutilate the wood of the bobbin butt. The two outside rings 13 and 15 are spaced apart a sufiicient distance that they firmly hold the bobbin butt. The two outside rings 13 and 15 are spaced apart a sufficient distance that they firmly hold the bobbin in the desired position. Then, since the center ring is smaller in external diameter than the outer rings and does not engage the spring jaws, slight irregularities in the spring jaws, notches or rings will not in any way render the grip of the jaws on the bobbin less firm.

Referring to the second embodiment of the invention, Figs. 2 and 3, the shuttle l6, cavity 17, spring jaws l8 and 19, cover 20, verticalbolt 21 and horizontal bolt 22 may be substantially the same as the corresponding parts above described, but the parallel notches are different. In this embodiment there are only three notches in each jaw, the two outer notches 23 and 25 being of the same depth while the center notch 24 is relatively deeper and longer than the outer notches.

The filling carrier is comprised of a bobbin 26 having rings 27, 28 and 29 on the butt thereof. These rings are formed of spring steel of circular cross-section and, as above, the distance between adjacent rings is materially less than the diameter of the stock of which they are formed. Unlike the embodiment first described, the rings 27, 28 and 29 may all have the same external diameter, but the center ring 28 still does not engage the spring jaws because of the large size of the center notches 24.

It will be apparent that the construction just described can be used only where a three notch spring is acceptable. However, except for the limitation of the number of notches in the spring jaws this construction is obviously possessed of all the advantages enumerated above in connection with the embodiment of Figs. 1 and 4,

Having fully disclosed the preferred embodiments of my invention, I claim:

1. In a loom shuttle and filling carrier for looms of the bobbin changing type, a shuttle body having a filling-carrier-receiving cavity'therein,

opposed spring jawsat one end of said cavity;

and a filling carrier located in said cavity and having three circumferentially extending rings spaced along the butt thereof, the space between adjacent rings being substantially narrower than the thickness of the rings, the two outer rings being engaged in and held by notches in said spring jaws and the center ring being free of said spring jaws.

2. In a loom shuttle and filling carrier for looms of the bobbin changing type, a shuttle body having a filling-carrier-receiving cavity therein, opposed spring jaws extending along opposite sides of said cavity at one end thereof, said jaws being provided with parallel holding notches extending transversely thereof; and a filling carrier located in said cavity, said filling carrier having three circumferentially extending rings spaced along the butt thereof, said rings being all of substantially the same thickness and the space between adjacent rings being substantially less than saidthickness, the two outer rings only being engaged in and held by said notches and the center ring being free of said spring jaws.

3. In a loom shuttle and filling carrier for looms of the bobbin changing type, a shuttle body having a fil1ing-carrier-receiving cavity therein, opposed spring jaws extending along opposite sides of said cavity at one end thereof, said jaws being provided with parallel holding notches of substantially uniform depth and extending transversely of the jaws; and a filling carrier located in said cavity, said filling carrier having three circumferentially extending rings spaced along the ferred to a loom shuttle, said filling carrier having three circumferentially extending holding rings spaced along the butt thereof, said rings being all of substantially the same thickness and the space between adjacent rings being substantially less than said thickness, the two outer rings having substantially the same external diameter and the center ring having a materially smaller external diameter than said outer rings.

, WALLACE I. STIMPSON. 

